Another important thing to consider is the content that drives the two platforms. If you didn't buy any music from the iTunes store and just ripped stuff from CDs/Napster/Limewire/Kazaa, all the music that worked on your iPod worked on your non-Apple music player as well.

Such is not the case with apps. If you've spent a few hundred dollars on apps over the course of a few years using iOS devices, the cost to switch (assuming you care about continuing to use any of those apps once you're on Android) is pretty high.